Why does “item 2” come before “item 10”?
The sorter uses natural ordering, which compares numbers inside text by their value rather than digit by digit. That keeps file names, versions and numbered items in the order a person would expect.
How does case-sensitive sorting work?
With it off, “apple” and “Apple” are treated as equal, both for sorting and when removing duplicates. Turn it on to treat them as different lines.
What does numeric order do with lines that have no number?
Lines are sorted by the first number they contain. Lines without a number go to the end, sorted alphabetically.
Is the random order truly random?
It uses an unbiased Fisher–Yates shuffle, so every order is equally likely. Change any option or edit the text to shuffle again.